Advertisements
Advertisements
प्रश्न
Write chemical reactions to show the amphoteric nature of water.
उत्तर
The amphoteric nature of water can be described on the basis of the following reactions:
- Reaction with H2S-
The reaction takes place as:
\[\ce{\underset{Base}{H2O_{(l)}} + \underset{Acid}{H2S_{(aq)}} <=> \underset{Conjugate acid}{H3O^+_{(aq)}} + \underset{Conjugate base}{HS^-_{(aq)}}}\]
In the forward reaction, \[\ce{H_2O_{(l)}}\] accepts a proton from \[\ce{H_2S_{(aq)}}\]. Hence, it acts as a Lewis base. - Reaction with NH3-
The reaction takes place as:
In the forward reaction, `H_2O` denotes its proton to`NH_(3(aq))`. Hence, it acts as a Lewis acid. - Self-ionization of water-
In the reaction, two water molecules react as:
APPEARS IN
संबंधित प्रश्न
What do you understand by the term ’auto-protolysis’ of water? What is its significance?
Consider the reaction of water with F2 and suggest, in terms of oxidation and reduction, which species are oxidized/reduced.
Complete the following chemical reaction.
\[\ce{MnO^-_{4(aq)} + H_2O_{(g)} ->}\]
Classify the chemical reaction into (a) hydrolysis, (b) redox and (c) hydration reactions.
Complete the following chemical reaction.
\[\ce{Ca_3N_{2(s)} + H_2O_{(l)} ->}\] ?
Classify the chemical reaction into (a) hydrolysis, (b) redox and (c) hydration reactions.
What is the difference between the terms ‘hydrolysis’ and ‘hydration’?
Why is water used in hot-water bottles?
Give a reason why metals are arranged in a series called – ‘activity series of metals’. Name a metal which reacts with
(a) Cold water
(b) Boiling water
(c) Steam to liberate hydrogen in each case.
State a reason to prove that water is a compound and not a element.
The density of water is maximum at ________.
How can production of hydrogen from water gas be increased by using water gas shift reaction?
______ does not react with water at any temperature.
Write the chemical equation for the production of water when zinc reacts with sulphuric acid.
Polyphosphates are used as water softening agents because they ______.
The metal that gives hydrogen gas upon treatment with both acid as well as base is ______.
